Siemens Saturn Iie Epabx General Description Manual

SATURN IIE EPABX 
Maintenance and Troubleshooting 
- 
A30808-X5130-DllO-l-8920 
Issue 1, May 1986 
Table 4.05 Allowable Voltage Ranges 
MODULE/OUTPUT NOMINAL VOLTAGE 
VOLTAGE RANGE CONNECTOR-PIN 
LTUPS 
l + 5Vdc 
+ 4.9 tp + 5.2 Jl-2, -3, -12, -13 
(if system is equipped + 12Vdc 
+11.3 to +12.7 Jl-1, -11 
with LTU shelf(s)) -12Vdc -11.3 to -12.7 Jl-5, -15 
- 5Vdc - 4.9 to - 5.2 Jl-4, -14 
PSU - 5Vdc - 4.9 to - 5.2 JlO-1 
+ 5Vdc 
l * * + 4.9 to f 5.2 J9-1, -2, -3, 
:4; Jll-1, -2; 
J6-3 
+ 12Vdc +11.3 to...

A30808-X5130-DIIO-l-8920 
Issue 1, May 1986  SATURN IIE EPABX 
Maintenance and Troubleshootrng 
(b) If the circuit breaker trips off (down) again, 
switch it on again. 
(1) If the circuit breaker does not trip to off im- 
mediately, continue to observe it for a peri- 
od of time to determine that it remains on. 
Also, check system for proper performance. 
(2) If the circuit breaker trips off again, replace 
the associated power supply as indicated 
below: 
BASIC PS circuit breaker: replace the PSU. 
(If...

SATURN IIE EPABX 
A30808-X5130-DllO-l-8920 
Maintenance and Troubleshooting 
Issue 1, May 1986 
Jg,(I, j-J11w

SATURN IIE EPABX 
A30808-X5130-DllO-l-8920 
Maintenance and Troubleshooting 
issue 1, May 1986 
I J2/P2 
Pin 
1 -48Vdc (-488) 
2 Ground 
3 -48Vdc (-48P) 
4 Ground Jl/Pl 
Junction LINE-AC IN 
LINE AC IN 
Pin 
Box (AC%@ IN) 
(AC#l IN) 
1 AC Line 
Note 2 
2 AC Neutral 
3 AC Ground 
  -48PSo 
Note 1 PSU J2 
Notes: 
1. When -48PSl is installed, voltages on connectors Jl and J2 are the same as 
those on -48PSfi.  
2. Second AC input is required only when expansion cabinet is used and -48$PSl 
is installed....

SATURN IIE EPABX 
Maintenance and Troubleshooting A30808-X5130-DllO-l-6920 
Issue 1, May 1986 
(3) If the voltages return to normal after remov- 
ing all the PCBs, a PCB has probably short- 
ed. Reinsert the PCBs in the shelf, one at 
a time, and recheck the the PSU output vol- 
tages at the Basic Shelf after each PCB is 
inserted. If the low voltage readings return 
after inserting a PCB, the PCB is defective. 
Replace the PCB. 
(c) If all output voltages from the PSU are zero and 
ac is applied to the...

A30808-X5130-DllO-l-8920 
Issue 1, May 1986 
El 
+5Vdc 
J46IP46 
Pin 
1 RAC/RMW 
2 Ground 
3 -48Vdc 
(-48P) 
J47IP47 
Pin 
1 -5Vdc 
2 -48Vdc 
(-488) 
3 Ground 
4 Ground 
E2 
+ 5Vdc 
J48lP48 
Pin 
1 -12Vdc - 
2 +12Vdc 
3 +12Vdc 
4 Ground 
5 +5Vdc (a5B) 
’ E3 
-i- 5Vdc 
’ E4 
+5Vdc 
Figure 4.02 Basic Shelf Backplane Power Connections  

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SATURN IIE EPABX 
Maintenance and Troubleshooting A30808-X5130-DllO-l-8920 
Issue 1, May 1986 
Raceway 
PI 
Pin 
1 AC Line 
2 AC Corn1 
3 GND nor 
Jl 
Pin 
Pin Pin 
1 +12v 6 RET 11 +12v 
2 +5v 7 RET 12 +5v 
3 +5v 8 Keying Plug 13 +5V 
4 -5v 9 RET 14 -5v 
5 -12V 10 RET 15 -12v 
Figure 4.03 LTUPS Module Power Connections 
4-25  

SATURN IIE EPABX 
Maintenance and Trouhleshootlng 
J42 
Pin 
1 -k5v 
2 RING 
S GND 
4 -48P 
5 -5v 
J43 
Pin 
1 GND 
2 -488 
3 +5v 
4 +12v 
5 -12v 
’ J44 
Pin 
1 GND 
2 +5v 
3 +5v 
4 GND AC (+-5Vdc) 
(RAC/RMV 
(Ground) 
(Ground) 
(-48Vdc) 
(+SVdc) 
(Ground) 
V) ! 
Figure 4.04 LTU Shelf Backplane Power Connections 
4-16  

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SATURN IIE EPABX 
Maintenance and Troubleshooting 
4.07 Single-Line Telephone Related Failures. Step-by-step 
instructions for troubleshooting the single-line telephone (SLT) 
(i.e., 500-or 2500-type analog instrument) are provided below: 
a. If the SLT is completely inoperative (i.e., no talk battery), 
1. Using the SERVICE CMU Procedure, check serv- 
ice state of the circuit serving this SLT 
(a) If in-service, continue with step 2. 
(b) If out-of-service-craft, return the circuit to the...

SATURN IIE EPABX 
Maintenance and Troubleshooting 
I ’ 
A30808-X5130-DllO-l-8920 
Issue 1, May 1986 
in-service state (Table 4-lo), and verify opera- 
tion. Continue with step 2 if the SLT remains 
inoperative. 
(c) If out-of-service - automatic, attempt to return 
the circuit to the in-service state (Table 4-10). 
(1) If circuit returns to the in-service state and 
the failure clears, the problem was tran- 
sient. If transient problems recur on the 
same circuit, continue with step 2. 
(2) If the...